Although the two words weren't revolutionary we were quite surprised by the increase. Mind you we had about 6 other variations as well, including "It's free up to 250 contacts" and an orange version of the "Signup now!" button - both we thought would have higher conversion.
Right now it's about 1% of our raw unique daily visitors.
The tricky thing is to drill down and see which users these are and where are they coming from and how are they using Soocial. Any tips are welcome! ;-)
Yeah, true. We are looking into l10n and I18n. Right now just under 50% of our users are from the US. There is a seeming correlation between high conversion rates and english speaking countries and this would confirm your point.
In order of highest conversion rates are:
New Zealand (1.16%), United States (0.98%), Brazil, Australia, Ireland , UK (all around (0.79%), Singapore, South Africa (around 0.6%) then it levels out.